65887289 has 4 divisors (see below), whose sum is σ = 70955556. Its totient is φ = 60819024.

The previous prime is 65887267. The next prime is 65887301. The reversal of 65887289 is 98278856.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9517225 + 56370064 = 3085^2 + 7508^2 .

It is a cyclic number.

It is not a de Polignac number, because 65887289 - 2⁸ = 65887033 is a prime.

It is a super-2 number, since 2×65887289² = 8682269703539042, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65887289.

It is not an unprimeable number, because it can be changed into a prime (65887489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2534114 + ... + 2534139.

It is an arithmetic number, because the mean of its divisors is an integer number (17738889).

Almost surely, 2^65887289 is an apocalyptic number.

It is an amenable number.

65887289 is a deficient number, since it is larger than the sum of its proper divisors (5068267).

65887289 is a wasteful number, since it uses less digits than its factorization.

65887289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068266.

The product of its digits is 1935360, while the sum is 53.

The square root of 65887289 is about 8117.0985579824. The cubic root of 65887289 is about 403.8938244167.

The spelling of 65887289 in words is "sixty-five million, eight hundred eighty-seven thousand, two hundred eighty-nine".